Earthquakes are caused by the sudden movement of tectonic plates beneath the Earth's surface, which causes vibrations and tremors. They can be measured using instruments like the Richter scale from 0-9 and seismometers, which detect the location and strength of earthquakes.

1. Subject: GeographyYear: 9A3 SAYYDINA OTHMAN SECONDARY SCHOOL EARTHQUAKE Sir Juen

2. What is Earthquake? Is a sudden vibration/tremors of the earth crust due to the movement of the plates.

4. Features of Earthquake

5. Instrument Richer Scale 0-9 Seismometres